Pipe-wrench.



PATENTED JAN. 21, 1908.

G. PATER SON. PIPHWRENGH.

APPLICATION TILED NOV. 4, 1907.

U I 8mm 6 ew ye fade/"$017 w l/tmoow a the form. of a fiat metal bar.

' are inserted, said side I yer for the jaws, thereby increasing nrrnerase GEORGE PATERSON, OF BARRE, VERMONT.

PIPE-WBENCH.

Application filed N vember To all whom it may concern:

Be it known that I, GEORGE PATEnsoN, a citizen of the United States,Barre. in the county of Washington and State of Vermont, have inventedcertain new and uselul improvements in Pipe-Wrenches; and 1 do declarethe following to be a full, clear, and exact description of theinvention, such as will enable others skilled in the art to which itappertains to make and use the same.

This invention relates to improvements in pipe wrenches.

The object of the invention is to provide a pipe wrench haying pivotallyconnected coaing jaw members which are so engaged. by the handle thatthe latter forms a double lethe gripping power of the same.

With this object in view, the invention consists of certain novelfeatures of construction, combination and arrangement of parts as willbe more fully described and particularly pointed out in the appendedclaims.

.lnth'e accompanying drawings, Figure 1 is a side view of the wrenchshowing the jaws in a closed or operative position, parts being brokenaway and in section; Fig. 2 is a similar view showing the jaws in anopen position Fig. 3 is a frontedge view of the wrench; and Fig. 4 is aside view of the parts separated.

in the embodiment of my invention 1 provide a handle, 1, which may be ofany suitable length. and is preferably constructed in. On the outer endof the handle is arranged an elliptically shaped head, 2, which isintegrally connected to the handle bar by a reduced curved neck, 3,whereby said head is slightly oliset toward the rear edge of the handle.

Pivotally connected to the outer end of the handle is an inner member,4, said member being preferably formedby a pair of parallel side plates,5, between the inner ends of which the head 2 and neck plates beingplvotally connected with the end of the handle adjacent to the inner endof the neck portion 3,

thereby permitting said jaw member to swing freely on the outer end ofthe handle. On the outer ends of the plates 5 is formed the workingportion 01 the inner jaw, said portion being formed by substantiallyrightangu'lar projections 6, which. are connected together and spacedapart by a block 7,

Specification of Letters Patent.

residing at l 3 of the handle j Patented Jan. 21, recs.

4.1907. Serial No. 400.642.

tially to the curvature of the outer edges of projection, 6, and block7. of the and with which edge the inner edge of the outer jaw is adaptedto co-act in gripping a pipe or other object. In the inner edge of theextreme outer end of the working portion of the jaw 8 is a reducedconnecting plate 12, which is adapted to be inserted between the plates5 of the inner jaw member, said )late 12 being pivotally connected tothe plates 5 by means of a centrally disposed pivot bolt 1.3. On-theinner end of the con necting plate 12 is formed a forwardly projectingjaw-opening lug 14, and a rearwardly projecting jaw-closing lug 15,between which 18 formed arecess, 16, in which is. seated the ellipticalhead 2 of the handle.

The outer end of the jaw-opening lug 14 projects beyond the forwardedges of the lates 5 and between the upper edge of said ug and theadjacent lower edge of the spacing block 7 of the inner jaw member isarranged a jaw-closing spring, 17, which may be of any suitable form,but which is here shown as a coiled spring having its opposite endseated in recesses or sockets 18 formed in the upper edge of the lug 14,and the lower edge of the block 7.

In the operation of the device, the spring 17 will normally force thejaw members to the position shown in Fig. 1 of the drawings, in whichposition they are engaged with the pipe or other article to be turned,after which the handle 1 is swung in the roper direction to bring theelliptical head t ereon into engagement with the closing lug, 15, of theouter jaw, thereby forcing said lug outwardly and the working portion ofthe outer jaw downwardly or inwardly into engagement with the workingportion of the inner jaw. When the head 2 is thus engaged with. the lug15, the pivotal connection of the handle with theside plates 5 j theworking inner aw,

of the-inner jaw member will force said.

.'cc nnected at their inner ends to the outer g I 877,226 v movement ofthe lug 15, and thereby force the working portion of the inner jawoutwardly or into engagement with the opposite side of the pipe or otherarticle to be turned, the handle 6 thus exerting a double leveragepower, or, in other words, actuating both the inner and the outer jawsto cause the same to tightly grip the article between them, 4

Having thus described my invention, What I claim as new and desire tosecure by Letters-Patent, is: a

1. In a wrench of the character described, a handle, an operating headon the outer. end of said handle, an inner jaw member pivotally mountedon said handle, an outer jaw member pivotally mounted on the inner jaw,a s rin adapted to hold said 'outer jaw mem er 1n engagement with theinner jaw, and integrally formed 0 ening andclosing lugs on said outerjaw a apted to be engaged by the head on said handle, whereby said jawsare forcibly held in closed position and in en agement with the articleto which the wrenc is applied, substantially as described.

2. 1111 a wrench of the character described, a handle, an operating headon the outer end of said handle, an inner jaw member comprising a pairof parallel side plates, pivotally operating head on said handle to openand c ose said jaws, and a sprin to hold said jaws in closed position,su stantially as described 3. In a wrench of the character described,

a handle, an operating head formed on the outer end of said handle, aninner jaw member comprising a pair of parallel side plates pivotallyconnected at their inner ends to the outer ends of said handle,substantially rightangular working projections formed on the outer endsof said plates, a spacing block arranged between said rojections to forma working surface wit the outer edges thereof, an outer jaw membercomprising a curved working with the working projection of said innerjaw member, an integrally formed connecting late on said outer jawmember adapted to be inserted between the side inner jaw member andpivota y connected thereto, integrally formed opening and closing lugson the inner ends of. said connecting plate ada ted to be engaged by thehead on said han one of said lugs an of said inner jaw member,substantially as described. In testimony whereof I have hereunto set myhand in presence of two subscribing witnesses.

end of said handle, an outer jaw member GEORGE PATERSON comprising acurved Working portion adapted to co-act with the working portionWitnesses: of the inner jaw member, means on said GEO. AjREED,

outer jaw adapted to be engaged by thel MARY ESEXTON.

portion adapted toco-act e, and a spring arranged between the Workingprojection lates of the V

